Fraction Operations

LCM

100

LCM for 6 and 8

24

200

LCM for 3 and 6.

6

300

LCM for 8 and 9.

72

400

LCM for 5 and 12.

60

500

The LCM is 35. One of the numbers is 7, what is the other?

5

Adding/Subtracting Unlike Fractions

100

2/3 + 1/4

11/12

200

4/5 + 3/9

51/45 or 17/15 or 1 2/15

300

5/2 - 4/3

7/6

400

3/2 - 1/4

5/4

500

5/8 - 11/20

3/40

Multiplying Fractions

100

5/6  •  1/2

5/12

200

6/4  •  3/9

18/36 or 1/2

300

4/5  •  7/12

28/60 or 14/30 or 7/15

400

3/4  •  5/3

15/12 or 5/4

500

 1/5  •   1/3  • 2/6

2/90 or 1/45

Dividing Fractions

100

1/4 divide 5/7

7/20

200

2/9 divide 1/7

14/9

300

7/8 divide 1/2

Using double numbers!

1 3/4

400

7/8 divide 9/10

35/36

500

3/4 divide 1/3

Using DOUBLE NUMBER LINEs

2 1/4

Surprise!!!

100

Is 16/5 an improper fraction or a proper fraction? WHY?

improper fraction

Because the numerator is bigger than the denominator

200

The top number of a fraction  

Numerator

300

The number in the bottom of a fraction.

Denominator

400

Convert 13/2 into a mixed number

6 1/2

500

Simplify 8/12

2/3

Order and compare

100

Compare the following fractions:

6/7 _____ 4/5 

6/7 > 4/5

200

Compare:

2/9____3/7

2/9 < 3/7

300

Order the following fractions from least to greatest in the original fractions:

1/2

5/6

3/4

1/2

3/4

5/6

400

Order the following fractions from least to greatest in the original fractions:

1/2

1/6

3/10

1/6 = 5/30

3/10 = 9/30

1/2 = 15/30

500

Order the following fractions from greatest to least in the original fractions, using inequality symbols.

2/5

12/15

2/3

12/15 > 2/3 > 2/5